Possessives with of
We can talk about possession using the pattern: noun phrase + of + possessive pronoun:
Look at these examples.
Tom is a friend of mine. (= one of my friends) NOT a friend of me
Rachel came to the party with a cousin of hers. (= one of her cousins)
I borrowed some magazines of yours. (= some of your magazines)
Warning:
We use a possessive pronoun, not the object form of the pronoun:
A neighbour of mine called late last night. Not: A neighbour of me ...